New in Symfony 3.3: Deprecated the autowiring types

One of the most common issues when using autowiring in Symfony applications
is having two or more services implementing the same interface. The autowiring
subsystem cannot guess which one to use in each case and you end up seeing this
error message:

[SymfonyComponentDependencyInjectionExceptionRuntimeException]
Unable to autowire argument of type "…" for the service "…".

This problem is solved using the autowiring_types option to define which is
the default implementation to use: